Nokia Phones Use Radio Waves For Power

Cell phones, generally, use little power (unless you’re on 3G) especially during idle mode – so much so that Nokia believes the possibility of developing a cell phone that does not require any charging is high.

The Nokia Research Centre in Cambridge, UK is currently working on a phone prototype that can harness ambient radio waves otherwise known as electromagnetic radiation from antennas, TV masts, WiFi transmitters among others as a source of power. Like a typical RFID tag, the technology can convert electromagnetic waves into electric signals which it harnesses for power. Current prototype of the device can harness 3 to 5 milliwatts of electricity; far from the target 50 milliwatts needed to power a cell phone.

A Nokia Research rep believes it could take as soon as three to four years for the technology to be completely developed and released commercially. To be able to reach the 50 milliwatt goal, Nokia is working on a receiver that can tap into a wider variety of frequencies, since it could take as much as 1,000 different signals to get to that number. The moment it happens could be a breakthrough when it comes to energy sources for portable devices, as gadgets like media players require only 100 milliwatts to work.

However, I’d have to agree with Technology Review when they say that Nokia could ultimately combine this technology with other sources of renewable energy such as solar panels attached on cell phone casings.

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